Search results
Results From The WOW.Com Content Network
This list covers optical lens designs grouped by tasks or overall type. The field of optical lens designing has many variables including the function the lens or group of lenses have to perform, the limits of optical glass because of the index of refraction and dispersion properties, and design constraints including realistic lens element center and edge thicknesses, minimum and maximum air ...
Fisheye lens; first 600 units used a different barrel construction internally; [17] optically similar to the Minolta MC Fish-Eye Rokkor 16mm f / 2.8 (a.k.a. Leica Fisheye-Elmarit-R 16mm f / 2.8) produced up to 1981 with an optical design originally introduced in 1966/1968.
The Minolta AF Macro 100 mm f / 2.8 lens is a discontinued macro lens produced by Minolta that was renowned for its sharpness [2] all the while garnering raving reviews [3] also. . This lens achieves a true 1:1 magnification of the subject matter of interest to the photograph
As diffraction is based on aperture width in absolute terms rather than the f-stop ratio, lenses for very small formats common in compact cameras rarely go above f/11 (1/1.8") or f/8 (1/2.5"), while lenses for medium- and large-format provide f/64 or f/128.
For a given lens with the focal length f, the minimum distance between an object and the real image is 4f (S 1 = S 2 = 2f). This is derived by letting L = S 1 + S 2, expressing S 2 in terms of S 1 by the lens equation (or expressing S 1 in terms of S 2), and equating the derivative of L with respect to S 1 (or S 2) to zero.
The normal "full-stop" f-number scale for modern lenses is as follows: 1, 1.4, 2, 2.8, 4, 5.6, 8, 11, 16, 22, 32, but many lenses also allow setting it to half-stop or third-stop increments. A "slow" lens (one that is not capable of passing a lot of light through) might have a maximum aperture from 5.6 to 11, while a "fast" lens (one that can ...
A D-mount is a type of lens mount commonly found on 8mm movie cameras. Throat or thread diameter 15.88 mm (0.625 inch) Mount thread pitch 32 TPI Flange focal distance 12.29 mm D-Mount lenses have found new uses in the Nikon 1 series , Fujifilm X series , Pentax Q series and other modern mirrorless cameras via adapters.
The lack of an internal autofocus motor means that this lens cannot utilize its autofocus capabilities on entry-level camera bodies such as the D40, D60, D3000, D5000, D3100 or D5100; however, a newer version of the same lens, the Nikon AF-S Nikkor 50 mm f/1.8G, will autofocus successfully on these cameras. [2]